Fortify Shouts is an effect that reduces the cooldown time between shouts. The magnitude of this effect is alternatively expressed either in percentage or in points. An effect with a magnitude of 0.2 point actually causes a 20% reduction in time between shouts. A magitude of 0.2 reduces the ShoutRecoveryMult actor value from its base value of 1.0 to 0.8.

Note that a display bug causes the effect text in-game to appear inaccurate in some cases. Whenever an in-game display shows the 0.2 magnitude, it rounds the value, meaning that the text ends up saying that the effect is 0% instead of 20%.